XS length 13 cm top 5 * 5 cm adjustable range of 36-45 cm
     S 18 cm long top 6 * 8 cm adjustable range of 50-59 cm
     M length 19 cm top 6 * 8 cm adjustable range 55-64 cm
     L length 20 cm top 8 * 10 cm adjustable range of 63-74 cm